Abstract: Magnetically actuated impact equipment useful for high speed printers, punches or the like, is disclosed. Actuating magnets formed of materials characterized by wide hysteresis loops such as samarium-cobalt and mischmetal cobalt are disclosed. As disclosed, these magnets are oriented with like poles facing one another along opposite sides of gaps which run lengthwise of a print line. Magnetically actuated devices are shown with coils extending into the gaps with the plane of each coil being parallel to the print line. In one embodiment of the invention the magnets are arranged in upper and lower banks with coils on different movable devices extending upwardly and downwardly into gaps between the magnets in each bank. Another embodiment discloses coil-carrying devices which are mounted so as to be stepped along the gaps to various printing positions.

Abstract: Magnetically actuated impact equipment useful for high speed printers, punches or the like, is disclosed. Actuating magnets formed of materials characterized by wide hysteresis loops such as samarium-cobalt and mischmetal cobalt are disclosed. As disclosed, these magnets are oriented with like poles facing one another along opposite sides of gaps which run lengthwise of a print line. Magnetically actuated devices are shown with coils extending into the gaps with the plane of each coil being parallel to the print line. In one embodiment of the invention the magnets are arranged in upper and lower banks with coils on different movable devices extending upwardly and downwardly into gaps between the magnets in each bank. Another embodiment discloses coil-carrying devices which are mounted so as to be stepped along the gaps to various printing positions.

Abstract: Equipment for use in a high speed line printer or the like is disclosed which includes a series of independently actuatable print hammers mounted for reciprocation in adjacent side-by-side paths. All hammers are mounted on current carrying spring supports. The shank of each hammer carries a coil which is positioned with the turns of each coil lying in planes which are normal to fields generated by rectangular permanent magnets, e.g. sintered ceramic magnets, which are disposed on opposite sides of the hammers, and which have zones of opposite polarity extending transversely of the series of hammers. The coils on the hammers are located within portions of the fields generated by said zones of opposite polarity so that the hammers are individually driven along their paths upon delivery of an electrical impulse to the coils carried by the selected hammers.